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Что такое "User lookup"



 
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Garik
Специалист
Специалист



Joined: 11 Oct 2007
Posts: 60
PostPosted: Tue Mar 15, 2011 11:21 am    Post subject: Что такое "User lookup" Reply with quote
Добрый день, коллеги.
В статистике использования индекса
присутствуют поля: "User seeks", "User scans", "User lookup".

Где можно почитать, в каком случае сервер базы данных использует каждый из этих типов, и как они соотносятся друг с другом в плане производительности?

Гуглил, но инфы почти нет Crying or Very sad
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vga
Мастер
Мастер


Age: 170
Joined: 04 Oct 2007
Posts: 1218
Location: Санкт-Петербург
PostPosted: Wed Mar 16, 2011 12:10 pm    Post subject: Reply with quote
Хороший блог:

http://blogs.msdn.com/b/saponsqlserver/archive/2007/06/12/sap-dbacockpit-and-some-related-sql-scripts-part-1.aspx

http://blogs.msdn.com/b/saponsqlserver/archive/2007/06/12/sap-dbacockpit-and-some-related-sql-scripts-part-2.aspx
_________________
Молитва - это запрос разработчику на изменение кода программы.
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